Localized<b><i>f</i></b>electrons in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ce</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">RhIn</mml:mi></mml:mro

Alver, Ümit; Goodrich, R. G.; Harrison, N.; Hall, D.; Palm, E. C.; Murphy, T. P.; Tozer, S. W.; Pagliuso, P. G.; Moreno, N. O.; Sarrao, J. L.; Fisk, Z.

doi:10.1103/physrevb.64.180402

Cited by 63 publications

(63 citation statements)

References 20 publications

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“…Similar La-dilution studies have been performed in a wide range of heavy fermion materials, and a general trend in which heavy fermion antiferromagnets possess localized f-electrons and heavy fermion superconductors possess itinerant felectrons seems to emerge. Our measurements of Ce 1-x La x RhIn 5 may confirm this trend [27]. Both the observed dHvA frequencies, which measure the FS area, and the measured effective masses depend only weakly on La concentration, suggesting highly localized f-electrons.…”

Section: Degree Of F-electron Localzationsupporting

confidence: 70%

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CeMIn₅(M=Co, Ir, Rh) HEAVY FERMION SUPERCONDUCTORS AND THE UTILITY OF HIGH MAGNETIC FIELDS

Sarrao

2002

Int. J. Mod. Phys. B

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We review the properties of the recently discovered CeMIn5 (M=Co, Ir, Rh) heavy fermion superconductors and discuss the present state of our understanding of these materials. A particular focus is the role that magnetic fields have played in elucidating the properties of these materials. Specifically, we discuss quantum oscillation measurements on CeMIn5, the influence of applied field on the linear coefficient of specific heat, g, and the nature of the H-T phase diagrams in both the normal and superconducting states of these materials.

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Section: Degree Of F-electron Localzationsupporting

confidence: 70%

“…It has also proved possible to observe quantum oscillations in a wide range of alloys, in particular Ce 1-x La x MIn 5 [27,28]. Such measurements provide a model-free measure of the degree of f-electron localization in heavy fermion materials.…”

Section: Degree Of F-electron Localzationmentioning

confidence: 99%

CeMIn₅(M=Co, Ir, Rh) HEAVY FERMION SUPERCONDUCTORS AND THE UTILITY OF HIGH MAGNETIC FIELDS

Sarrao

2002

Int. J. Mod. Phys. B

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“…Band structure calculations [8] compare well with these observations if the Ce 4f electrons are treated as localized in CeRhIn 5 and itinerant in CeCoIn 5 , a picture further supported by comparisons to the non-f -electron analogue LaRhIn 5 [5,9].…”

Section: Methodssupporting

confidence: 56%

Observation of de Haas-van Alphen oscillations across the phase diagram of CeRh_1-xCo_xIn₅

Sutherland

Goh

O’Farrell

et al. 2009

J. Phys.: Conf. Ser.

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Abstract. The evolution of the Fermi surface of CeRh1−xCoxIn5 was studied as a function of Co concentration x via measurements of the de Haas-van Alphen effect. We observe several quantum oscillation frequencies in single crystal samples prepared with values of x spanning the alloy phase diagram. By tracking the evolution of these frequencies as the applied magnetic field is rotated, we establish that the Fermi surface undergoes an abrupt change in shape when x ≃ 0.4. This is well away from the quantum critical concentration x ≃ 0.8 where antiferromagnetic order gives way to paramagnetism.

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“…31 It is important to mention that, as Eu 2+ and Ba 2+ have the same valence, this evolution of the electronic structure is presumably caused by the subtle changes in the tetragonal crystal structures (and in the Fe-As bonds) of EuFe 2 As 2 (c/a = 3.1006) and BaFe 2 As 2 (c/a = 3.2849). 32 Recent EXAFS experiments reported that the Fe-As bonds in BaFe 2 As 2 are slightly smaller upon hydrostatic pressure, hole, and electron doping. 33 The increasing localization of the itinerant Fe d at the Fe sites claimed in this work for Ba 1−x Eu x Fe 2 As 2 is consistent with all previous experiments mentioned above and may help the understanding of the SDW phase suppression by doping in this class of materials.…”

Section: -3mentioning

confidence: 99%

Evolution of Eu2+spin dynamics in Ba1−xEux
Rosa
¹
,
Adriano
²
,
Iwamoto
³

et al. 2012
Phys. Rev. B
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Single crystals of Ba 1−x Eu x Fe 2 As 2 were studied by magnetic susceptibility, heat capacity, resistivity, and electron spin resonance (ESR) measurements. Spin-density wave (at T SDW ) and antiferromagnetic (at T N ) phase transitions were mapped as a function of x. For x 0.2, we found a single Eu 2+ ESR Dysonian line that presents an isotropic linear increase (Korringa) of its linewidth ( H ) above T SDW which systematically decreases with decreasing x. In contrast, for a critical concentration x c (0.10 < x c < 0.20), H decreases with increasing T , suggesting a distinct relaxation process that we associate with a Eu 2+ Kondo single impurity regime. The Korringa rate suppression towards the Ba-rich compounds is claimed to be due to the reduction of the q-dependent exchange interaction between the Eu 2+ f electrons and the conduction electrons, which is likely associated with an increasing of localization of Fe d electrons. This result may help the understanding of the SDW phase suppression (that can lead to superconductivity) in this class of materials.

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Localizedfelectrons inCexLa1−xRhIn

Cited by 63 publications

References 20 publications

CeMIn₅(M=Co, Ir, Rh) HEAVY FERMION SUPERCONDUCTORS AND THE UTILITY OF HIGH MAGNETIC FIELDS

CeMIn₅(M=Co, Ir, Rh) HEAVY FERMION SUPERCONDUCTORS AND THE UTILITY OF HIGH MAGNETIC FIELDS

Observation of de Haas-van Alphen oscillations across the phase diagram of CeRh_1-xCo_xIn₅

Evolution of Eu2+spin dynamics in Ba1−xEux
Rosa
¹
,
Adriano
²
,
Iwamoto
³

et al. 2012
Phys. Rev. B
Self Cite
15
1
15
1
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Localizedfelectrons inCexLa1−xRhIn

Cited by 63 publications

References 20 publications

CeMIn5(M=Co, Ir, Rh) HEAVY FERMION SUPERCONDUCTORS AND THE UTILITY OF HIGH MAGNETIC FIELDS

CeMIn5(M=Co, Ir, Rh) HEAVY FERMION SUPERCONDUCTORS AND THE UTILITY OF HIGH MAGNETIC FIELDS

Observation of de Haas-van Alphen oscillations across the phase diagram of CeRh1-xCoxIn5

Evolution of Eu2+spin dynamics in Ba1−xEuxRosa1, Adriano2, Iwamoto3 et al. 2012Phys. Rev. BSelf Cite151151View full textAdd to dashboardCite

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CeMIn₅(M=Co, Ir, Rh) HEAVY FERMION SUPERCONDUCTORS AND THE UTILITY OF HIGH MAGNETIC FIELDS

CeMIn₅(M=Co, Ir, Rh) HEAVY FERMION SUPERCONDUCTORS AND THE UTILITY OF HIGH MAGNETIC FIELDS

Observation of de Haas-van Alphen oscillations across the phase diagram of CeRh_1-xCo_xIn₅

Evolution of Eu2+spin dynamics in Ba1−xEux
Rosa
¹
,
Adriano
²
,
Iwamoto
³

et al. 2012
Phys. Rev. B
Self Cite
15
1
15
1
View full text Add to dashboard Cite